#include"mystdio.h"
#include<unistd.h>
#include<string.h>
#define MYFILE "log.txt"

int main()
{
  MY_FILE*fp=my_fopen(MYFILE,"w");
  if(fp==NULL) return 1;
  const char* str="hello my file";
  int cnt=5;
  //操作文件
  while(cnt)
  {
  char buffer[1024];
  snprintf(buffer,sizeof(buffer),"%s:%d\n",str,cnt--);

  size_t size=my_fwrite(buffer,strlen(buffer),1,fp);
  sleep(1);
  printf("当前成功写入%lu个字节\n",size);
  }
  my_fclose(fp);
  return 0;
}
